[RP] exec exec

[twb]

When exec'ing from RP, if your add 'exec' after the last semicolon you
can avoid having a shell process lying around for every emacs and
xterm you start.

E.g. bind C-c exec exec xterm, bind C-d exec cd /alt/wget; exec dillo

There is a noticeable overhead in startup times.

-t
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